Surgical instrument



FIG. 1 is a top front perspective view of a surgical instrument showing the claimed design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a left side view thereof; and,

FIG. 7 is a right side view thereof.

The evenly-dashed broken lines in the figures show portions of the surgical instrument that form no part of the claimed design.

The shade lines in the figures show contour. 

CLAIM The ornamental design for a surgical instrument, as shown and described. 